Bulldog security All information published in the vehicle diagram pages is gathered from sources which are thought to be reliable and accurate but we advise everyone check and verify our information by testing with a computer friendly test light to ensure proper connections are made. How to Wire the Bulldog Powered-Drive Trailer Jack The Bulldog Powered-Drive Trailer Jack, item # BD500200, only has one wire, the power wire. This jack attaches to ground through the mounting hardware and the trailer frame. When wiring the jack to your 7-Way trailer connector you will need to make sure that the ground wire from the 7-Way trailer connector is attached to the trailer frame to provide ground. BULLDOG - Powered Jacks BULLDOG ®, the BULLDOG ® logo, and BULLDOG ® graphics are the servicemarks, trademarks, or registered trademarks owned by Horizon Global Corporation. All other servicemarks, and trademarks are the property of their respective owner. Installation of a 3500lb Capacity RV Tongue Jack - YouTube Installation of an $80 electric tongue jack on the nose of a 32' Travel Trailer. Category Howto & Style; Show more Show less. Loading Bulldog Powered Drive Trailer Jack Review - etrailer - Duration: 12:18. etrailer 8,209 views. 12:18.